The old couple have no one to do housework; they have to fend for themselves.没有人为两位老人做家务; 他们得自己照顾自己。A pair of reapers help fend off the attack.几个收割者辅助攻击这些小狗.The woman and her young baby had been thrown out and left to fe...
Amorphous beryllium hydride , as ablator, can increase conversion from laser to X - rays .非晶 BeH2 材料作为烧蚀层, 掺入高Z元素后可以提高激光 -X 光的转换效率.Toxicity problem in manufacturing and storage might be alleviated by coating beryllium wi...
Normal chromosome pairing between most species and N . tabacum is rare.大多数的种与红花间的正常染色配对是少见的.In first place we now find the Belgian pairing of Nancy Feber and Laurence Courtois.现在处于第一位的是比利时组合南希·费博和劳伦斯·库尔图瓦。At this point ,...